curl -X GET 'https://api.resend.com/contacts/contact-id/topics?limit=10&after=example-after&before=example-before' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0'

# GET /contacts/{contact_id}/topics (Resend API)
Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-09-03

> Retrieve topics for a contact

## Critical Gotchas
* All requests must include a `User-Agent` header (e.g. `User-Agent: my-app/1.0`) or the API returns HTTP 403.
* The `to` field is an array of strings, even when sending to a single recipient.

## cURL
curl -X GET 'https://api.resend.com/contacts/contact-id/topics?limit=10&after=example-after&before=example-before' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| contact_id | path | string | Yes | The Contact ID or email address. |
| limit | query | integer | No | Number of items to return. |
| after | query | string | No | Return items after this cursor. |
| before | query | string | No | Return items before this cursor. |

## Response (200 OK)
{"object":"list","has_more":true}

---
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GET

/contacts/{contact_id}/topics

Resend API

Retrieve topics for a contact

Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-09-03 · upstream hash matched

Actions

Agents: curl -H "Accept: text/markdown" this URL
→ 223 tokens · Vary: Accept

Critical gotchas

All requests must include a User-Agent header (e.g. User-Agent: my-app/1.0) or the API returns HTTP 403.

The to field is an array of strings, even when sending to a single recipient.

cURL

curl -X GET 'https://api.resend.com/contacts/contact-id/topics?limit=10&after=example-after&before=example-before' \  -H "Authorization: Bearer $RESEND_API_KEY" \  -H 'User-Agent: my-app/1.0'

Get a free Resend API key → sponsored

Parameters

Name	In	Type	Required	Description
contact_id	path	string	Yes	The Contact ID or email address.
limit	query	integer	No	Number of items to return.
after	query	string	No	Return items after this cursor.
before	query	string	No	Return items before this cursor.

Response 200 OK

{
  "object": "list",
  "has_more": true,
  "data": [
    {
      "id": "string",
      "name": "string",
      "description": "string",
      "subscription": "opt_in"
    }
  ]
}